How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Friday100.0*Chance in playoffs100.0*Average seed
Potomac 5 Salem 4 -12.4
-0.3
Potomac 4 Salem 2 -12.3
-0.3
Winston-Salem 5 Wilmington 3 -5.8
-0.1
Winston-Salem 11 Wilmington 3 -5.8
-0.1
If winner is:HomeAway
Saturday100.0*Chance in playoffs100.0*Average seed
Winston-Salem vs Wilmington-3.6+8.6
-0.1+0.2
Potomac vs Salem-6.6+3.1
-0.2+0.1
Potomac vs Salem-6.6+3.1
-0.2+0.1

What If

Chances based on how well the Salem finish out the regular season.   Explain

100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678Count
4310-084.8%8515295,382
429-160.761391,670,665
418-233.233674,383,663
407-313.213876,806,038
396-43.7409606,922,517
385-50.7109734,817,756
374-60.100861402,330,882
363-70.000544430771,015
352-8Out1460250166,908
341-9Out027666021,306
330-10Out248419010,040
Total:13.9%140833000028,196,172
Games Above .500
Chance Will Make Playoffs